File indexing completed on 2024-12-22 05:15:20

 /*
     SPDX-FileCopyrightText: 2013 Eike Hein <hein@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "draghelper.h"
 
 #include <QApplication>
 #include <QDrag>
 #include <QMimeData>
 #include <QQuickItem>
 #include <QQuickWindow>
 #include <QTimer>
 
 DragHelper::DragHelper(QObject *parent)
     : QObject(parent)
 {
 }
 
 DragHelper::~DragHelper()
 {
 }
 
 int DragHelper::dragIconSize() const
 {
     return m_dragIconSize;
 }
 
 void DragHelper::setDragIconSize(int size)
 {
     if (m_dragIconSize != size) {
         m_dragIconSize = size;
 
         Q_EMIT dragIconSizeChanged();
     }
 }
 
 bool DragHelper::isDrag(int oldX, int oldY, int newX, int newY) const
 {
     return ((QPoint(oldX, oldY) - QPoint(newX, newY)).manhattanLength() >= QApplication::startDragDistance());
 }
 
 void DragHelper::startDrag(QQuickItem *item, const QUrl &url, const QIcon &icon, const QString &extraMimeType, const QString &extraMimeData)
 {
     // This allows the caller to return, making sure we don't crash if
     // the caller is destroyed mid-drag (as can happen due to a sycoca
     // change).
 
     QMetaObject::invokeMethod(this,
                               "doDrag",
                               Qt::QueuedConnection,
                               Q_ARG(QQuickItem *, item),
                               Q_ARG(QUrl, url),
                               Q_ARG(QIcon, icon),
                               Q_ARG(QString, extraMimeType),
                               Q_ARG(QString, extraMimeData));
 }
 
 void DragHelper::doDrag(QQuickItem *item, const QUrl &url, const QIcon &icon, const QString &extraMimeType, const QString &extraMimeData)
 {
     setDragging(true);
 
     if (item && item->window() && item->window()->mouseGrabberItem()) {
         item->window()->mouseGrabberItem()->ungrabMouse();
     }
 
     QDrag *drag = new QDrag(item);
 
     QMimeData *mimeData = new QMimeData();
 
     if (!url.isEmpty()) {
         mimeData->setUrls(QList<QUrl>() << url);
     }
 
     if (!extraMimeType.isEmpty() && !extraMimeData.isEmpty()) {
         mimeData->setData(extraMimeType, extraMimeData.toLatin1());
     }
 
     drag->setMimeData(mimeData);
 
     if (!icon.isNull()) {
         drag->setPixmap(icon.pixmap(m_dragIconSize, m_dragIconSize));
     }
 
     drag->exec();
 
     Q_EMIT dropped();
 
     // Ensure dragging is still true when onRelease is called.
     QTimer::singleShot(0, qApp, [this] {
         setDragging(false);
     });
 }
 
 void DragHelper::setDragging(bool dragging)
 {
     if (m_dragging == dragging)
         return;
     m_dragging = dragging;
     Q_EMIT draggingChanged();
 }